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wnma3mz avatar wnma3mz commented on June 26, 2024

hhhh,书上是这么实现的,肯定有更优雅的解决代码and第三方包

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wizardforcel avatar wizardforcel commented on June 26, 2024

这就是网格搜索啊。p和q本质上是超参数。

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shwangdev avatar shwangdev commented on June 26, 2024

@wizardforcel P, Q是由自相关和偏相关系数直接决定的。不需这样搜索。写书的人也是一知半解。这种书不看也罢。

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wizardforcel avatar wizardforcel commented on June 26, 2024

@wxjeacen P 和 Q 并没有解析解,它们是使自相关和偏相关系数最优的值,等于说还是搜索问题。

网格搜索从结果上来看等价于自相关和偏相关系数的最优化。与之相比,心智负担更小,但开销可能更大。

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shwangdev avatar shwangdev commented on June 26, 2024

@wizardforcel 你真的懂自相关和偏相关系数吗?我还第一次听说这两个系数有最优值。

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